Automatic toll-ticketing telephone system



Nov 1, 1949 R. F. STEHLIK 2,486,722

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Patented Nov. 1, 1949 AUTOMATIC TOLL-TICKETIN G TELEPHONE SYSTEM RudolphFrank Stehlik, Antwerp, Belgium, as-

signor, by mesne assignments, to Automatic Electric Laboratories, Inc.,Chicago, 111., a corporation of Delaware Application June 12, 1939,Serial No. 278,601 In Great Britain June 21, 1938 39 Claims. I

The present invention relates to telephone systems and while it is moreparticularly concerned with systems having facilities for automaticallyrecording particulars of a call, certain features of the invention havea broader aspect.

In connection with the automatic recording of particulars of a call itwill be understood that there is certain essential information whichmust be recorded in order that the total cost of the call may bedetermined and debited to the correct subscriber. This essentialinformation comprises the calling and called parties directory numbers,the charging rate or tariff for the connection and the duration of theconnection. Other information may also be recorded but the above is theinformation usually necessary for accounting purposes.

The object of the invention is to provide apparatus and circuits, in anautomatic telephone system, for determining the called partys numher,the tariff or rate of charge to be applied to a connection, the callingpartys number, and the duration of the connection, and for controllingthe transmission of this information to recorder apparatus in order tomake a permanent record thereof.

According to one feature of the present invention, impulses transmittedby the calling party are arranged to effect the setting up of aconnection and the operation of recording equipment either directly orindirectly by means of mechanical impulse repeaters and calling partyidentification is effected by transmitting to the recording equipmentimpulse trains corresponding to the calling partys number.

It will be understood that an important feature in arrangements of thisnature is the provision of a register which will record the calledpartys number for those calls on which a record is to be made.

According to this feature of the invention, a mechanical impulserepeater is taken into use to respond to impulses transmitted by acalling party, the mechanical impulse repeater only being made effectiveto repeat impulses on calls which are to be recorded.

According to a further feature of the invention, a mechanical impulserepeater is automatically taken into use to receive impulses transmittedby the calling party certain of which impulses also effect the settingup of a connection and in accordance with the position taken up by astorage device which responds to certain of the impulses transmitted bythe calling party,

the mechanical impulse repeater is adapted to be released or toretransmit all the impulses transmitted by the calling party.

According to another feature of the invention, a mechanical impulserepeater is adapted to be taken into use on the initiation of a call toreceive impulses transmitted by a calling party and is adaptedsubsequently on a stage of the connection being reached at whichrecording is effected to repeat impulses, stored by it to impulseresponding equipment taken into use at said stage to enable the calledpartys number to be recorded.

According to yet another feature of the invention, a mechanical impulserepeater is automatically taken into use to receive impulses transmittedby the calling party during the setting up of a connection and isadapted to retransmit impulses stored by it to impulse respondingequipment by which the recording equipment is controlled.

According to still another feature of the invention, all the impulsestransmitted by the calling party are adapted to control a mechanicalimpulse repeater while the initial impulses are arranged to control thesetting up of a connection to a recording point independently of themechanical impulse repeater and subsequently all the impulses stored bythe mechanical impulse repeater are transmitted to the recording pointfor the purpose of recording the called partys number and controllingthe further setting up of the connection after the said initial impulseshave been received.

It is to be understood that by the expression mechanical impulserepeater is meant a registering and sending device in which the lengthof a train of outgoing impulses is determined by a mechanical markingcorresponding to the received train rather than by an electrical markingas is more usual. An example of a device of this nature is found inBritish Patent No. 458,095.

The invention will be better understood from the following descriptionof one embodiment taken in conjunction with the accompanying drawings inwhich Fig. 1 shows the trunking layout of the system,

Figs. 2-6 show the skeleton circuits of a known type of finder switchand also the detailed circuits of the equipment for determining thecalling partys number. These figures should be arranged as shown in Fig.20 to give the complete circuit.

Figs. 7-11 show the detailed circuits of the first.

group selector and the discriminating register which includes amechanical impulse repeater.

